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Apr
21
answered Image of the unit circle under a complex rational function
Apr
21
answered How to get this list with a terse method
Apr
21
comment Coloured image transformation in pointillism
@M.R. The function Delaunay is defined for v9, as stated. For v10, after the statement defining p, use: m=DelaunayMesh[p] to define the mesh m. Then get the mesh vertices 'v' with v=MeshCoordinates[m]. Finally, form the triangles t with t=Map[v[[#]]&,MeshCells[m,2][[All,1]]]. In the function DelaunayImageColour replace Delaunay[p] with 't'.
Mar
24
answered How to deal with overlapping data points in ListPLot
Mar
24
answered How to recreate the gnuplot color scheme “AFM Hot” in Mathematica?
Mar
20
comment Finding a seven-digit number with all of its prime factors less than 20?
In case someone visits this (badly asked) closed question, it seems to be about smooth numbers. A small code, yet too big for this marginal comment, shows there are 11447 seven-digit numbers composed of only primes less than 20. The smallest is 1000000, the largest is 9997020.
Mar
8
comment How to do multi-agent modeling?
Perhaps the books by Richard J Gaylord et al. Computer Simulations with Mathematica, and Modeling Nature: Cellular Automata Simulations with Mathematica.
Mar
6
revised Perfect numbers
update for v10.4
Mar
2
comment Solving cubic equation for real roots
@MHH Equations 7 and 8 in the MathWorld link you mention show how to calculate the discriminant. In this case, $a_3=\beta$, $a_2=0$, $a_1=-\gamma$, and $a_0=-c$. The wikipedia article Discriminant gives a similar presentation at the top of the page, and section 6.2 discusses the "Nature of the roots".
Feb
28
comment Determining the local extrema of discrete data
Assume f={2,1,1}. Then m=MedianFilter[f,1]={3/2,1,1}. The function value 2 is greater than the filtered value 3/2, so there is a local maximum at the first position, that is at f=2. There is no local minimum because no value of f is less than the corresponding value of m.
Feb
24
awarded  Nice Answer
Feb
23
answered Find the minimum positive-integer value which meet the requirement
Jan
29
answered Goldbach Partition
Jan
29
answered Encoding/Decoding matrices as integers, integers as matrices
Jan
29
comment A function about prime gaps
Yes. For any range of primes, some gaps will not appear. Dale's code hides this by using Flatten to remove missing gaps. Your adjustment to include Fail before Flatten reveals the limitation.
Jan
28
answered A function about prime gaps
Jan
27
revised Artefact at joints within BSplineCurve of low Opacity
added 278 characters in body
Jan
27
answered Detecting components in timeseries
Jan
23
reviewed Approve LogLinearPlot issues
Jan
19
answered Resolve does not resolve this statement with quantifier